body {
    position: relative;
}

* {
    margin: 0;
    padding: 0;
}

.w {
    width: 700px;
    margin: 0 auto;
}
a{
    text-decoration: none;
}
a:hover{
    text-decoration: none;
}

#header {
    width: 750px;
    min-width: 320px;
    height: 90px;
    background-color: #f5f5f5;
    position: fixed;
    top: 0;
    left: 50%;
    transform: translate(-50%);

}

#header .w {
    display: flex;
    flex-direction: row;
}
#header .w .icon-sousuo{
    position: absolute;
    top: 30px;
    left: 205px;
    font-size: 25px;
    color: #999;
}
#header .w input {
    flex: 1;
    height: 60px;
    background-color: rgb(179, 111, 28);
    border: 0;
    vertical-align: middle;
    margin-top: 15px;
    margin-right: 22px;
    border-radius: 15px;
    background-color: #ebebeb;
    font-size: 22px;
    text-align: center;
}

#header .w .search {
    text-align: center;
    width: 120px;
    height: 60px;
    margin-top: 15px;

}
.icon-yijianfankui{
    font-size: 25px;
    color: #0084ff;
    line-height: 60px;
}
#header .w .search a{
    padding-left: 5px;
    font-size: 23px;
    color: #0084ff;
    font-weight: 700;
}
#nav{
    height: 70px;
    width: 750px;
    min-width: 320px;
    padding-top: 90px;
    margin: 0 auto;
    display: flex;
    border-bottom: 1px solid rgb(224, 221, 221);
    margin-bottom: 18px;
}
#nav a{
    display: block;
    flex: 1;
    font-size: 25px;
    color: #c4c4c4;
    text-align: center;
    line-height: 70px;
}
#nav a:nth-child(3){
    color: #1a1a1a;
    border-bottom: 3px solid #1a1a1a;
}
#main{
    width: 750px;
    min-width: 320px;
    height: 1000px;
    margin: 0 auto;
    margin-bottom: 80px;

}
#main .w ol{
    display: flex;
    flex-direction: column;
    height: 1000px;
    list-style: none;
}
#main .w li{
   flex: 20%;
   margin: 20px;
   display: flex;
   justify-content: space-between;
   border-bottom: 1px solid #ababab;
}
#main .w li h1{
   font-size: 28px;
   color: #242424;
   line-height: 60px;
   
}
#main .w li p{
    font-size: 16px;
   color: #ababab;
   padding-left: 38px;
}
#main .w li h1 span{
    color: #f1403c;
    padding-right: 10px;
}
#footer{
    width: 750px;
    min-width: 320px;
    margin: 0 auto;
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translate(-50%);
    background-color: #f5f5f5;
    
}
#footer .w{
    display: flex;
    height: 100px;
    align-items: center;
    border-top: 1px solid #ababab;
}
#footer a{
    display: block;
    flex: 1;
    text-align: center;
    color: #999;
    font-size: 18px;
}
#footer a:hover{
    color: #0084ff;
}
#footer a span{
    font-size: 30px;
}